观察此讯号的时间单位缩小，我们可以发现，其变化相当的缓慢，关于这种现象，我们称其具有「短时间稳定(short time stationary)之性质【1】，通常我们将此观察的单位称为一个「音框(frame)，因此我们可以对声音讯号做「短时距处理(short time processing..
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At a certain point, the Astra will stop for a short time and an astronaut will attempt to leave the stationary spaceship and then return to it.
在某一定点上，阿斯特拉号将短暂停留，一名宇航员将试着离开静止不动的宇宙飞船，然后再返回。
Investigation characteristic of real world audio, combine stationary for short time-scale and non-stationary for longer time-scales, proposed a time frequency domain blind source separation algorithm.
研究了实际环境语音信号的特性，结合语音信号的短时平稳性和长时非平稳性，给出了一种时频域盲分离算法。
In this paper, two kinds of new time-frequency analysis approaches for non-stationary signal processing are introduced, which are wavelet transform and short-time Fourier transform.
本文介绍处理非平稳信号的新型工具——小波分析、短时付氏变换两种时频分析方法。
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